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The plausibility of visual information for hand ownership modulates multisensory synchrony perception
Zopf
R
author
Friedman
J
author
Williams
M
A
author
2015
English
We are frequently changing the position of our bodies and body parts within complex environments. How does the brain keep track of ones own body? Current models of body ownership state that visual body ownership cues such as viewed object form and orientation are combined with multisensory information to correctly identify ones own body, estimate its current location and evoke an experience of body ownership. Within this framework, it may be possible that the brain relies on a separate perceptual analysis of body ownership cues (e.g. form, orientation, multisensory synchrony). Alternatively, these cues may interact in earlier stages of perceptual processingvisually derived body form and orientation cues may, for example, directly modulate temporal synchrony perception. The aim of the present study was to distinguish between these two alternatives. We employed a virtual hand set-up and psychophysical methods. In a two-interval force-choice task, participants were asked to detect temporal delays between executed index finger movements and observed movements. We found that body-specifying cues interact in perceptual processing. Specifically, we show that plausible visual information (both form and orientation) for ones own body led to significantly better detection performance for small multisensory asynchronies compared to implausible visual information. We suggest that this perceptual modulation when visual information plausible for ones own body is present is a consequence of body-specific sensory predictions.
Multisensory perception
Temporal synchrony perception
Virtual hand
Body representations
Body ownership
Sensory predictions
exported from refbase (https://refbase.nfshost.com/show.php?record=78), last updated on Sat, 25 Jul 2015 15:31:19 +0000
text
http://dx.doi.org/10.1007/s00221-015-4300-2
https://refbase.nfshost.com/files/zopf/2015/78_Zopf_etal2015.pdf
http://dx.doi.org/10.1007/s00221-015-4300-2
10.1007/s00221-015-4300-2
Zopf_etal2015
Experimental Brain Research
2015
Springer Berlin Heidelberg
continuing
periodical
academic journal
233
8
2311
2321
0014-4819
1